Vernier Software and Technology
Vernier Software & Technology

Lemon Battery

Figure from experiment 12 from STEM 2 with Vernier and LEGO® MINDSTORMS® NXT


“Juice” is a slang term sometimes used for electricity. It comes from the fact that electrochemical batteries are formed when two conducting materials are immersed in an acidic solution. When the conducting materials are connected by a wire, electric current will flow. In this activity, you will study some basic principles of electrochemical batteries using the juice of a lemon as the battery solution, called the electrolyte. Small strips of conducting materials will be inserted into the lemon to act as electrodes. The acid in the lemon juice helps break down the atomic structure of the conducting materials causing individual electrons to be released. You will use a Differential Voltage probe to measure the voltage produced.


In this experiment, you will

  • Build a lemon battery.
  • Use a Voltage Probe and NXT to measure and display cell voltages.
  • Discover which materials produce a voltage.
  • Decide which materials make the "best" battery.

Sensors and Equipment

This project/activity features the following Vernier sensors and equipment.

Additional Requirements

You will also need NXT Sensor Adapter and a LEGO MINDSTORMS NXT robotics system.

STEM 2 with Vernier and LEGO® MINDSTORMS® NXT

See other experiments from the lab book.

2First-Class Levers
3Audio Assistant
6String Tension Tester
7Gas Pressure
8Yeast in Action
9Grip Strength
10Cartesian Diver
12Lemon Battery
13Battery Tester
14Solar Cells
15Solar Tracker
16Mapping a Magnetic Field
18Migrating Robot
19Magnet Finder
20Mine Sweeper

Project/activity 12 from STEM 2 with Vernier and LEGO® MINDSTORMS® NXT Lab Book

<em>STEM 2 with Vernier and LEGO<sup>®</sup> MINDSTORMS<sup>®</sup> NXT</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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